Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dorothy Preston, PH.D
Psychologist in Goodyear, AZ · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1881099836
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Registry record
Entity type Individual (Type 1)
Name Dorothy Preston
Credential PH.D
Sex Female
Practice address 1646 N Litchfield Rd, Suite 200, Goodyear, AZ, 85395
Phone (623) 643-9598
Fax (623) 478-0960
Enumeration date Nov 1, 2014
Last updated in NPPES Nov 1, 2014
Taxonomy & licenses
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What specialty is Dorothy Preston?
Dorothy Preston is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-11-01.